I’ve attached 1.62. I previously downloaded it from the wiki page…
<LINK_TEXT text=“http://www.seeedstudio.com/wiki/DSO_Qua … mware_List”>http://www.seeedstudio.com/wiki/DSO_Quad:Upgrading_Firmware#Firmware_List</LINK_TEXT>
You just drag or copy the SYS file to the DFU drive… same as for installing the app.
I have also successfully installed Wildcat 4.4 on HW 2.72 w/ SYS 1.60. Performance seems the same as HW 2.81.